Upgraded your iDevice to iOS 4.0.2? Then don't expect to be able to jailbreak it, at least not from tools provided by hackers band the iPhone Dev Team.

The group this week confirmed that 4.0.2 - and, indeed, iOS 3.2.2 - plugs the hole the team had exploited in its latest crack, Jailbreakme 2.0.

Rather than waste time trying to find an alternative entry point into the operating system, the team will instead focus on the near-to-completion iOS 4.1.

While Apple's increasing willingness to ship unlocked iPhones has lessened some users' need for the jailbreak, others owners like to be able to install apps that haven't been sourced from the iTunes App Store.

Jailbreaking is crucial to being able to do so. 'Unauthorised' apps are usually delivered through a app called Cydia. ®